Big ole batteries!

[MaintenanceMan]

I potentially have access to more of these.
Pictures can be taken of voltages and I would take specific gravity readings as well.
I am fairly certain they would be reasonable.
Any intrest? Located in Mississippi and delivery could be arranged.
My main motivation would be to get someone to purchase a set so they can help me solve the problems of utilizing batteries this big. Lol

 

[timselectric]

Voltage?

 

[MaintenanceMan]

Voltage?

I have 14 batteries.
Use 12 to make 24 vacation and 2 "backups"
You have something similar?

 

[MaintenanceMan]

I have 14 batteries.
Use 12 to make 24 vacation and 2 "backups"
You have something similar?

Vdc not vacation

 

[timselectric]

So, they are 2.1v lead acid cells?
I have some old locomotive batteries, made up of 2.1v lead acid cells. I haven't used them for anything, yet. Just keep them charged. But they were free , so I took them.

 

[MaintenanceMan]

So, they are 2.1v lead acid cells?
I have some old locomotive batteries, made up of 2.1v lead acid cells. I haven't used them for anything, yet. Just keep them charged. But they were free , so I took them.

These are 2500amp hr. How big are yours and how do you charge them?

 

[timselectric]

These are 2500amp hr. How big are yours and how do you charge them?

It's been a while since I looked at them, so I don't remember. Just remember that they were very heavy.
6 in series with an automotive battery maintainer.
I think it's a Battery Tender brand. They are in a shed, on the far side of the property. I haven't laid eyes on them in over a year. lol

 

[MaintenanceMan]

Omg. Lol
I guess these are calcium lead acid batteries and they need extra volts to charge and because of the massive capacity I am under the impression that I need to charge at an amperage rate that equals 10% of the batteries capacity to overcome internal resistance to complete the chemical reaction that occurs during charging...I think. Lol

 

[timselectric]

My battery maintainer, includes a desulfator. So, I just let them hang out, until I find a purpose for them.
I should probably check the water levels. lol

 

[timselectric]

I only have 12 cells. And I don't have a need for 12 or 24 volts.

 

[MaintenanceMan]

My battery maintainer, includes a desulfator. So, I just let them hang out, until I find a purpose for them.
I should probably check the water levels. lol

Am I thinking about this to much, is there a simple charging solution?

 

[timselectric]

They can be charged just like any other lead acid cells. Just pick what voltage you want and get a charger for that voltage. Most lead acid batteries are made up of 2.1v cells. This is why automotive batteries have 6 water caps.

 

[MaintenanceMan]

You don't think I need to worry about the 10% rule?

 

[timselectric]

10% is a good base to start with.
It could take more, depending on current cell degradation. (Possible sulfation)

 

[MaintenanceMan]

10% is a good base to start with.
It could take more, depending on current cell degradation. (Possible sulfation)

So a 2500amphr battery would need to be charged with 250amphr charger?
I am not finding anything like that other than forklift battery chargers. I was hoping for something a little fancier than that. Lol

 

[timselectric]

Yeah, that's a big charger. Could probably get by with something smaller. If I were to use them, it would be in a solar system. So, hundreds of charging amps wouldn't be an issue. My AIO's are good for 100a Each.

 

[MaintenanceMan]

I can't figure out if these batteries are cyclable.
In a few months I could afford enough solar to get them working but if they are not designed to cycle then I need to charge them from my utility power and keep them as a backup if my utility company don't keep up with tree cutting maintenance. Lol
I am replying back between passes.

 

[timselectric]

Should be good for cycling down to 50%. I can't think of any other reason to build these batteries.
I wouldn't want to know what they would be designed for as a starting battery.

 

[MaintenanceMan]

Should be good for cycling down to 50%. I can't think of any other reason to build these batteries.
I wouldn't want to know what they would be designed for as a starting battery.

These came from a bank of 120. They powered backup lube pumps for turbine bearing lubrication

 

[timselectric]

Cycling should be fine.